Desalination and Water Treatment
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2024
·
IF 1
Jian-jun Lian,Meng Wu,Hong-yan Wu,Yan-ting Liu,Qing Xu,Man-jun Miao,Jian-hua Yang,Ke-ke Mao,Bo Chen,Feng Xue,Qiao-ping Kong,Ming-hao Shang,Xiu-ling Li
The significant increase in demand for molybdenum (Mo) resources has led to excessive molybdate (Mo(VI)) content in water, posing a challenge to the innovation of Mo(VI) removal technology in water bodies. Nanoscale iron sulfide (FeS) has an important effect on the environmental behavior of Mo(VI) in aquatic solutions. To address the issue of easy agglomeration and poor stability of FeS, zirconia sol-modified nanoscale iron sulfide (Zr-FeS) was synthesized, and the adsorption behavior of Zr-FeS on Mo(VI) from diverse aquatic solutions was also investigated in this study. The results showed that the removal rate of Mo(VI) was increased from 28.60% to 78.32% within pH value of 7.0 when Zr/Fe molar ratio was elevated from 0 to 0.5. Moreover, the Mo(VI) adsorption efficiency by Zr-FeS was closely related to pH values, and acid conditions were beneficial for Mo(VI) adsorption. The pseudo-second-order model demonstrated a better fit to the data compared to other models. The maximum adsorption capacity of Zr-FeS towards Mo(VI) value calculated by Langmuir isotherm model was 118.48 mg/g at 298 K. The thermodynamic analysis revealed that the adsorption process of Mo(VI) was endothermic, entropically favorable, and spontaneous in nature. Competing anions (e.g., PO 4 3– , HCO 3 – , and SO 4 2– ) partially inhibited the adsorption process of Mo(VI) by Zr-FeS. While the process was less affected by dissolved oxygen and aging. The results of Fourier-transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and density functional theory (DFT) calculations revealed that the main mechanisms for Mo(VI) removal were hydrogen bonding, electrostatic interaction and surface complexation. The high stability and fast adsorption rate indicated that Zr-FeS was a promising material to remove Mo(VI) from the aquatic solutions.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Fengmin Li,Yue Zhang,Boyang Tian,Zheng Zhou,Li Ye,Jesse C. Carozza,Wensheng Yan,Haixiang Han,Chunhua Xu
The naturally-formed iron (hydr)oxides on the surface of zero valent iron (ZVI) have long been considered as passivation layer and inert phases which significantly reduce the reaction activities when they are employed in environmental remediation. Although it seems there are no direct benefits to keep these passivation layers, here, we show that such phases are necessary intermediates for the transformation to iron sulfides through an anion exchange pathway during sulfidation of ZVI. The pre-formed (hydr)oxides undergo a phase evolution upon aging and specific phases can be effectively trapped, which can be confirmed by a combination of different characterization techniques including scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRPD), and X-ray absorption near edge structure (XANES) spectroscopy. Interestingly, after sulfidation, the resultant samples originated from different (hydr)oxides demonstrate different activities in the Cr(VI) sequestration. The XANES investigation of Fe K edge and Fe L 2,3 edge indicates Fe remains the same after sulfidation, suggesting a non-redox, anion exchange reaction pathway for the production of iron sulfides, where O 2- anions are directly replaced with S 2- . Consequently, the structural characteristics of the parent (hydr)oxides are inherited by the as-formed iron sulfides, which make them behave differently because of their different structural natures.
研究领域:
环境科学
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材料化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 10
·26889-26900
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IF 5.19
Jiang Chunlu,Zhou Shijia,Li Chang,Yue Fengdie,Zheng Liugen
A ZnCl 2 -modified biochar-supported nanoscale iron sulfide composite (FeS-ZnBC) was successfully prepared to address the easy oxidization of FeS and enhance Cr(VI) removal from water. The material was characterized by SEM, XRD, FTIR, and XPS. The effects of FeS:ZnBC mass ratio, FeS-ZnBC dosage, solution pH, initial Cr(VI) concentration, and reaction time on the adsorption performance were investigated. The results revealed that the optimum adsorption capacity of FeS-ZnBC (FeS:ZnBC = 1:2) for Cr(VI) was 264.03 mg/g at 298 K (pH = 2). A Box-Behnken design (BBD) was applied to optimize the input variables that affected the adsorption of Cr(VI) solution. The results revealed that the highest removal (99.52%) of Cr(VI) solution was achieved with a Cr(VI) initial concentration of 150.59 mg/L, FeS-ZnBC adsorbent dosage of 2 g/L, and solution pH of 2. The sorption kinetics could be interpreted using a pseudo-second-order kinetic model. The isotherms were simulated using the Redlich-Peterson isotherm model, indicating that Cr(VI) removal by the FeS-ZnBC composites was a hybrid chemical reaction-sorption process. The main mechanisms of Cr(VI) removal by FeS-ZnBC were adsorption, chemical reduction, and complexation. This study demonstrated that FeS-ZnBC has potential application prospects in Cr(VI) removal.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2023
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IF 3
Jiamin Sun,Chuang Liu,Qiancun Wang,Hang Yang,Xiangyu Gao,Yi Deng,Weizhong Yang,Miaomiao He
Phototherapy as a potential alternative has recently emerged for clearance of bacterial infection. However, single photothermal therapy often causes damage to skin and tissues due to excessive temperature. To overcome this deficiency, a bimetal-doped nanosheet (FeS@Cu 2 O) is successfully devised and fabricated via a hydrothermal method, which possesses photothermal, photodynamic and chemo-dynamic properties. The FeS@Cu 2 O not only exerts hyperthermal property as a potential photothermal agent, but also can efficiently produce ROS to eliminate bacteria via released bimetal (Fe 2+ and Cu + ). The antibacterial experiment indicates that the sample has a great antibacterial effect against E. coli and S. aureus . This work provides new ideas for the versatile multimodal synergistic therapy for sterilization.
研究领域:
生物医学工程
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材料科学
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微生物学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Zhiyi Wang,Jiming Su,Jianchao Wang,Yijin Feng,Qianqian Xu,Hui Wang,Hongru Jiang
In the context of the ongoing advancements in high-performance chips, heat dissipation, and electromagnetic shielding within electrical and electronic equipment are becoming increasingly intricate. Plastics have garnered widespread usage in electrical and electronic equipment as prevalent framework materials. However, the challenge persists in achieving a unification of electromagnetic interference (EMI) shielding, thermal conductivity (TC), and electrical insulation performance for plastics. Herein, we capitalize on the styrene–butadiene–styrene (SBS) copolymer to integrate the merits of polymers and magnetic minerals. Utilizing pyrrhotite (Pyr) tailings and waste polystyrene (PS) as raw materials, a formable block material denoted as PS-S@SBS/Pyr has been formulated. This material exhibits commendable performance in terms of TC, electrical insulation, and EMI shielding performance concurrently. The bidirectional bridging effect of SBS effectively reduces the interfacial thermal resistance between PS and Pyr. The TC of PS-S@SBS/Pyr can reach a maximum of 1.36 W/m‧K with a resistivity greater than 10 8 Ω‧m. Moreover, PS-S@SBS/Pyr consistently demonstrates a stable EMI shielding effectiveness of 33.1 dB within the 8–12 GHz frequency range, with absorption shielding predominating as the underlying mechanism. This green preparation method makes efficient utilization of two main solid wastes while increasing the added value of the material.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xingliang Chen,Tao Shi,Kailiang Zhong,Guanglei Wu,Yun Lu
The composite hybrid with novel hierarchical structure composed of 1T/2H MoS 2 nanoflower and watermelon-like FeS 2 @carbon nanospheres (FeS 2 @C@MoS 2 ) were synthesized via a facile method. Morphologies and structures of the hybrid were investigated thoroughly by using SEM, TEM, XRD, Raman, XPS and BET. The optimized composite hybrid with an appropriate ratio of carbon, FeS 2 and MoS 2 performs a high specific capacitance (1321.4 F·g −1 at 2 A·g −1 ) and a capacitance retention rate of 81.2% at 6 A·g −1 after 1000 cycles charge-discharge. Such new material has the potential to be a strong competitor in high performance supercapacitor electrode materials, and this facile synthesized method can hopefully be applied or as a reference to develop other metal sulfide@MoS 2 hybrid or multiple sulfides hybrid.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2019
·
IF 5.383
Ruizhi Zhang,Zhaoqiang Zhu,Jiahao Lin,Kefu Zhang,Nan Li,Chongjun Zhao
Non-noble-metal based catalysts for overall water splitting have attracted widespread attention. Herein, we report a Fe(II) hydrolysis reaction assisted in-situ etching and growth method for the design of Fe 2 O 3 nanoparticles-anchored ultrathin Ni(OH) 2 nanosheets composites on nickel foam (Fe 2 O 3 /Ni(OH) 2 /NF), followed by solvothermal sulfidation conversion into FeS/NiS/NF electrode. As-prepared FeS/NiS/NF electrode possesses low overpotentials of 203 mV and 144 mV to achieve a current density of 10 mA cm −2 in 1.0 M KOH for OER and HER, respectively. FeS/NiS/NF directly serves as both anode and cathode to assemble a two-electrode water electrolyzer, which only requires a voltage of 1.618 V to afford water-splitting current density of 10 mA cm −2 in 1.0 M KOH. Additionally, this water splitting device can also be driven by using photovoltaic solar panels. This work provides a new strategy to tailor the components and structure of the catalyst and thus to improve electrocatalytic performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2018
·
IF 13.709
Hongli Wan,Jean Pierre Mwizerwa,Xingguo Qi,Xin Liu,Xiaoxiong Xu,Hong Li,Yong-Sheng Hu,Xiayin Yao
High ionic conductivity electrolyte and intimate interfacial contact are crucial factors to realize high-performance all-solid-state sodium batteries. Na2.9PS3.95Se0.05 electrolyte with reduced particle size of 500 nm is first synthesized by a simple liquid-phase method and exhibits a high ionic conductivity of 1.21 × 10–4 S cm–1, which is comparable with that synthesized with a solid-state reaction. Meanwhile, a general interfacial architecture, that is, Na2.9PS3.95Se0.05 electrolyte uniformly anchored on Fe1–xS nanorods, is designed and successfully prepared by an in situ liquid-phase coating approach, forming core–shell structured Fe1–xS@Na2.9PS3.95Se0.05 nanorods and thus realizing an intimate contact interface. The Fe1–xS@Na2.9PS3.95Se0.05/Na2.9PS3.95Se0.05/Na all-solid-state sodium battery demonstrates high specific capacity and excellent rate capability at room temperature, showing reversible discharge capacities of 899.2, 795.5, 655.1, 437.9, and 300.4 mAh g–1 at current densities of 20, 50, 100, 150, and 200 mA g–1, respectively. The obtained all-solid-state sodium batteries show very high energy and power densities up to 910.6 Wh kg–1 and 201.6 W kg–1 based on the mass of Fe1–xS at current densities of 20 and 200 mA g–1, respectively. Moreover, the reaction mechanism of Fe1–xS is confirmed by means of ex situ X-ray diffraction techniques, showing that partially reversible reaction occurs in the Fe1–xS electrode after the second cycle, which gives the obtained all-solid-state sodium battery an exceptional cycling stability, exhibiting a high capacity of 494.3 mAh g–1 after cycling at 100 mA g–1 for 100 cycles. This contribution provides a strategy for designing high-performance room temperature all-solid-state sodium battery.
研究领域:
材料科学
·
能源存储与转换
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jian Zhang,Shuoxiao Zhang,Lingyu Zhang,Qing Yin,Zelin Wu,Jingbin Han
Two-dimensional Fe–beidellite/carbon (Fe–BEI@C) superlattice-like heterostructure was prepared by intercalation of glucose in the gallery of layered Fe–BEI followed by calcination. The interlaminar and superficial carbon coating enables Fe–BEI to have good rate performance, fast lithium-ion diffusion, and high pseudocapacitance contribution, leading to excellent lithium storage performance as anode material for lithium-ion batteries (LIBs). The Fe–BEI@C/Li half cell delivers a maximum specific capacity of 850 mAh·g–1 at 0.5 A·g–1 and has a 92.3% retention rate after 100 cycles along with a high-rate performance of 403 mAh·g–1 at 5 A·g–1. The reversible valence state change of Si2+/Si4+ and Fe0/Fex+ (0 < x < 3) in electrochemical cycles are realized without collapse of layered structure. Additionally, the Fe–BEI@C heterostructure displays a high Li+ diffusion coefficient of 10–13∼10–10 cm2 s–1, illustrating fast Li+ transfer in the interlayer of Fe–BEI@C heterostructure. Dynamic analysis reveals that the Si redox reaction is almost dominated by surface control and that of Fe is mainly diffusion-controlled. This work has exploited a novel layered silicate as anode material for LIBs and developed a molecular-level carbon hybridization method to improve their electrochemical performance, which is meaningful for the application of layered silicate in the energy-storage field.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2024
·
IF 9.6
Ning Hui-Long,Liang Chao-Ping,Qiang Shan-Shan,Li Jie-Xiang,Tang Sheng,Li Ye-Tao,Sun Wei,Yang Yue
Iron disulfide (FeS 2 ) has been widely used in thermal batteries because of its high theoretical specific capacity and voltage plateau. However, low thermal decomposition temperature, poor conductivity and inferior actual specific capacity limit its wide applications. Herein, we report a gold-doped FeS 2 (FeS 2 -Au), which not only reduces the band gap of the FeS 2 crystals but also enriches the electron transport path of FeS 2 by the formation of Au nanoparticles. First-principles calculation shows that the diffusion energy barrier of lithium-ion is reduced after the Au-doped FeS 2 . In addition, Au increases the electron cloud density around sulfur atoms, which helps to enhance the stability of Fe-S covalent bonds and thus results in better thermal stability of FeS 2 . When the Au content is 130 μg·g −1 (FeS 2 -Au 4 ), the thermal decomposition temperature (TG 5% ) of FeS 2 -Au is 72.2 °C higher than that of pristine FeS 2 . At a discharge temperature of 500 °C, a current density of 200 mA·cm −2 and a cutoff voltage of 1.4 V, FeS 2 -Au 4 demonstrates superior specific capacity and high specific energy compared to FeS 2 . More precisely, the specific capacity of FeS 2 -Au 4 attains a value of 379 mAh·g −1 , with a corresponding specific energy of 714 Wh·kg −1 . In contrast, the discharge specific capacity and specific energy of FeS 2 are lower, amounting to 348 mAh·g −1 and 656 Wh·kg −1 , respectively. This study offers a novel approach to enhancing the electrochemical performance of FeS 2 in high-temperature molten salt electrochemical systems (thermal batteries), thereby laying a solid foundation for its potential practical application. Graphic abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Chao Gong,Jinli Zhai,Xi Wang,Wenjie Zhu,Daoli Yang,Yongming Luo,Xiaoya Gao
Herein, a heterogeneous photo-Fenton and photo-catalytic system was constructed using oxide pyrite (FeS 2 /Fe 2 O 3 ) mineral and organic acids including tartaric acid (TA), ascorbic acid (AA), and citric acid (CA). In the proposed system, FeS 2 /Fe 2 O 3 can be successfully activated through irradiation to generate photogenerated carriers, which generated H 2 O 2 in-situ through the reduction reactions between e - and O 2 . The addition of organic acids enhanced the dissolution of iron from FeS 2 /Fe 2 O 3 . Based on the iron and in-situ generated H 2 O 2 , •OH was produced through a photo-Fenton reaction. Furthermore, h + , e - , and •O 2 − , which were generated through the photo-catalytic activation of FeS 2 /Fe 2 O 3 , also played a certain role in the degradation of carbamazepine (CBZ). Therefore, the synergistic photo-Fenton and photo-catalytic reaction improved the degradation of CBZ, with the degradation efficiencies of 86%, 62%, and 68% in FeS 2 /Fe 2 O 3 /TA, FeS 2 /Fe 2 O 3 /AA, and FeS 2 /Fe 2 O 3 /CA systems, respectively. This investigation provides an innovative strategy for the removal of organic pollutants using natural minerals.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Dan Yuan,Shungang Wan,Yong Xiao,Lei Sun
This study involves the construction of an “inside-out” electronic network channel with in-situ formation of biogenic FeS (bio-FeS) nanoparticles in cells of Shewanella oneidensis MR-1 ( S . oneidensis MR-1) and a coating of conductive polypyrrole (PPy) on the outer surface of entire cells. The microbial fuel cell driven by bio-FeS and PPy co-modified S . oneidensis MR-1 (FeS/PPy@MR-1) has a maximum power density 3.6 times higher than that of the native strain. Electrochemical analysis demonstrates that the modifications of bio-FeS and PPy markedly enhance the direct electron transfer and c -type cytochrome-bound flavin-mediated single-electron reaction pathways and expand the electron output flux. The electron-donating ability of FeS/PPy@MR-1 is 7 times greater than that of the native strain. Bio-FeS and PPy can mediate novel intra/extracellular transmembrane electron transport pathways independent of the traditional respiratory chain, bridge spatially discrete redox environments, and optimize electron transfer pathways to intracellular to extracellular transfer electrons rapidly and maximally. These findings provide insights into conductive nanomaterial-mediated intra/extracellular transmembrane electron transfer, which is critical for the environment and bioenergy fields.
研究领域:
环境科学
·
生物能源
·
微生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）